'\" te
.\"  Copyright 1989 AT&T  Copyright (c) 1997, Sun Microsystems, Inc.  All Rights Reserved
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.TH UMASK 2 "Dec 28, 1996"
.SH NAME
umask \- set and get file creation mask
.SH SYNOPSIS
.LP
.nf
#include <sys/types.h>
#include <sys/stat.h>

\fBmode_t\fR \fBumask\fR(\fBmode_t\fR \fIcmask\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBumask()\fR function sets the  process's file mode creation mask to
\fIcmask\fR and returns the previous value of the mask. Only the access
permission bits of \fIcmask\fR and the file mode creation mask are used. The
mask is inherited by child processes. See \fBIntro\fR(2) for more information
on masks.
.SH RETURN VALUES
.sp
.LP
The previous value of the file mode creation mask is returned.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
_
MT-Level	Async-Signal-Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR mkdir (1),
.BR sh (1),
.BR Intro (2),
.BR chmod (2),
.BR creat (2),
.BR mknod (2),
.BR open (2),
.BR stat.h (3HEAD),
.BR attributes (7),
.BR standards (7)
